Abstrakt

Oxidation of triethylene glycol by N-chlorosaccharin in cetyltrimethylammonium bromide catalyzed system: A kinetics and mechanistic study

Vandana Sharma*, K.V.Sharma, V.W.Bhagwat

The kinetics and mechanistic study of cetyltrimethylammonium bromide catalyzed oxidation of triethylene glycol [2,2'-ethylene diqxybis(ethanol)] by N-chlorosaccharin in aqueous acetic acid medium in presence of perchloric acid have been investigated at 303-323K temperature range. The reaction has first order dependence on N-chlorosaccharin concentration. The reaction rate follows first order kinetics with respect to [triethylene glycol] with excess concentration of other reactants. The micelle effect due to cetyltrimethylammonium bromide- a cationic surfactant has been studied. The change in ionic strength shows negligible salt effect. The dielectric effect is found to be positive. Addition of one of the products (saccharin) retards the reaction rate.Activation parameters are calculated from the Arrhenious plot. A suitable mechanism has been proposed in consistence with the kinetic data.